RGD uses the Human Disease Ontology (DO, https://disease-ontology.org/) for disease curation across species. RGD automatically downloads each new release of the ontology on a monthly basis. Some additional terms which are required for RGD's curation purposes but are not currently covered in the official version of DO have been added. As corresponding terms are added to DO, these custom terms are retired and the DO terms substituted in existing annotations and subsequently used for curation.
A viral infectious disease that results_in inflammation located_in liver, has_material_basis_in Hepatitis delta virus, which is an incomplete virus that requires the helper function of Hepatitis B virus to replicate and only occurs among people who are infected with the Hepatitis B virus. The infection has_symptom fatigue, has_symptom lethargy, has_symptom anorexia, has_symptom nausea, has_symptom jaundice, has_symptom clay-colored stools, has_symptom dark urine, has_symptom changes in personality, has_symptom disturbances in sleep, has_symptom confusion, has_symptom abnormal behavior, has_symptom somnolence, and has_symptom coma. (DO)